Regarding option 3 - It's the same as option 1, except that in option 1 its OK to use the return-less computers as well as the 92/93 5.2 return-type, whereas option 3 is limited to the return-type computer. I think the 92/93 5.2 computer shouldn't require the Intrepid regulator since that is the only V8 return-type computer and would be able to run the larger 92/93 injectors fine w/out the Intrepid regulator. The 92/93 5.2 fuel pump is also the only return-type fuel pump, although I don't know if there's anything different about it other than the fittings. Injector sizes changed in the 90's though I don't recall the cutoff/change years. To be safe, match your injectors (by year) to your PCM.

Something else to note: As far as I can tell, there never was a return-type fuel system on the 5.9. The 5.9 Magnum came on the scene with a return-less system right from the git-go in '93. In the '92 the 360/5.9 wasn't a Magnum, it was still an LA engine. While it seems logical to think that a 92/93 5.2 would take a smaller injector than a 5.9, remember that the 5.2 in those years had a slightly hotter cam and larger exhaust ports - so it probably breathed a little deeper.

The more you think about it, the more confusing it gets sometimes.

 

Wiser words never said....

So....To cut to the chase, I secured a 95 5.2L running dakota for a donor.

From this truck I'll be using/rebuilding the transmission, wiring harness, intake, fuel rail, distributor, ignition box, sensors, front springs, et al.

I of course will have the fuel pump/fuel tank at my disposal as well, and the fuel lines.

Will NOT be using the 5.2L engine, but a 5.9L Crate

Based on that, best route to go? Returnless or Return?

Sounds like if I go return, I can keep the 5.2PCM, 90 fuel tank/fuel pump and use the intrepid regulator.

If I go returnless, I'll need to swap over fuel tank/fuel pump and find a '95 5.9 PCM?

Disadvantage/Advantage to either way?

 

If you are using a 5.2L engine, you will not need a 5.9L pcm, just use your 5.2L PCM and swap over to returnless style fuel. It'll be the easiest way for you to do it.

 

Not using the engine...have a 5.9L mopar crate I'm using

 

Ah sorry I misunderstood.

Then in my mind if you want something that will just "work" then I would do the 5.9L PCM and go returnless. Then your PCM and your fuel pressures will play nicely together, and it will be no different than if that 5.9L was in its original vehicle. You won't have to worry about your air/fuel ratio as your PCM will take care of it, as it has the correct mapping for that fuel system.

If you go return style with the intrepid regulator and 5.2L PCM, you will need to up the fuel pressure to avoid leaning out. You'll actually have to tune the system to perform properly, or else you could end up with it running rich, or worse, lean. This system is more tunable, and if you like to tinker and do other mods to the engine, this would be the way to go. But if you just want to install the 5.9L and drive it, this is probably a bit more work to get setup correct.

 

Ok, sounds like returnless is easiest, considering I have all the parts at my disposal. Thanks!

 

Sort of have a concurrent thread running over here

https://dodgeforum.com/forum/1st-gen...ml#post3068388

talking about PCM/fuel options, and it seems that I've run into a brick wall with fuel management for a high HP 360. The crate I anticipate using is a MP 360/380HP...I thought MPI was the way to go from reading and listening to others, but it seems now that perhaps the ODBI PCM options won't get me there? That I may have to drop back to carburetion.

Anyone blazed this trail and have any words of advice?

 

Okay, keeping this thread on track for the build....Going to try and stick with MPI.

With that said, does anyone know the stock injector size on a 95 V8? Part # is the same for 5.2 or 5.9, but I'm having difficulty finding the specs. Also, the stock manifold CFM? Or maybe point me to a link with this kind of info. I've tried searching the FAQ's and forums and not been successful.

EDIT: Nevermind found it: Thanks Crazy https://dodgeforum.com/forum/2592323-post4.html

However, that info seems to contradict what I found at the parts store: According to the above link, the 93-95 5.2L is the same at 18 #'s. And the 93-95 5.9L is the same at 24 #'s. The part store shows that correctly for 93, but for 94 on, the 5.2L and 5.9L injectors are the same part #, I'm assuming at 24 #'s.

In any case, stock injectors won't cut it for a 400 HP build. According to http://www.fuelinjector.citymaker.co...low_Rates.html I'll need 32 #'s at least.

 

Donor truck I picked up today...Not bad for $700

Runs strong, almost hate to use it for parts

95 Dakota 2wd, 5.2L Magnum, 2wd Auto w/ AC

Came w/ custom Headliner even

http://s195.photobucket.com/user/rob...ideshow/Dakota

 

Couple of questions...

How much room is gained if I swap the 95 front end with the 90? Enough to run the ac cooler? Is it all bolt on...hood and front clip or is there fabrication involved?

Anyone used a m1 single plane in 90? Concerned about height and whether I'll need to go with a ram air hood...not opposed to that just getting ducks in a row. The dual plane m1s with carb setups that a few have done is much lower profile than the single plane m1 it seems.